Optimisation of high-temperature heat pump cascades with internal heat exchangers using refrigerants with low global warming potential
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Other documents of the author: Mota-Babiloni, Adrián; Mateu-Royo, Carlos; Navarro-Esbrí, Joaquín; Moles, Fran; Amat-Albuixech, Marta; Barragán Cervera, Angel
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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Title
Optimisation of high-temperature heat pump cascades with internal heat exchangers using refrigerants with low global warming potentialAuthor (s)
Date
2018-12-15Publisher
ElsevierBibliographic citation
MOTA-BABILONI, Adrián; MATEU-ROYO, Carlos; NAVARRO ESBRÍ, Joaquín; MOLÉS, Francisco; AMAT ALBUIXECH, Marta; BARRAGÁN CERVERA, Ángel (2018). Optimisation of high-temperature heat pump cascades with internal heat exchangers using refrigerants with low global warming potential. Energy, v. 165, Part B, p. 1248-1258Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S0360544218319601Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
High-temperature heat pumps (HTHPs) based on vapour compression can be used for industrial
low-grade waste heat valorisation, which can aid in mitigating climate change. Currently, the
performance of ... [+]
High-temperature heat pumps (HTHPs) based on vapour compression can be used for industrial
low-grade waste heat valorisation, which can aid in mitigating climate change. Currently, the
performance of HTHPs operating at high-temperatures lifts is limited; therefore, advanced
configurations become an opportunity for their utilization. This paper presents an HTHP cascade
with configurations of internal heat exchangers (IHXs) that uses low GWP refrigerants in both
high-stage (HS) (HCFO-1233zd(E), HFO-1336mzz(Z), HCFO-1224yd(Z), and pentane) and low-
stage (LS) (HFO-1234yf, HFO-1234ze(E), butane, isobutane, and propane) cycles. Prior to the
analysis and presentation of results, an optimisation of the operating conditions is performed
based on intermediate temperature and IHX effectiveness in both stage cycles. Results indicate
that butane and isobutane appear to be the most convenient working LS fluids from the point of
view of coefficient of performance (COP). The highest system performance is obtained using
pentane and HFO-1336mzz(Z) in the HS cycle. Compared to third-generation refrigerants (HFC-
245fa/HFC-134a), a slight COP improvement is obtained using HCFO-1233zd(E), and HCFO-
1224yd(Z). A comparable or even lower volumetric flow rate at the HS compression suction is
also observed. The use of pentane/butane achieved maximum COP (3.15), which is a 13%
improvement compared to COP obtained when HFC-245fa/HFC-134a is employed. [-]
Is part of
Energy (2018), v. 165, Part BInvestigation project
1) Financial support of the Spanish Government under the ENE2015-70610-R and RTC-2015-4193-3 projects, and grant FJCI-2016-28324; 2) University Jaume I of Spain for their financial support under project P1-1B2015-38.Rights
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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